| Cover - USD ($) | 12 Months Ended | ||
| Oct. 31, 2019 | Jan. 31, 2020 | Apr. 30, 2019 | |
| Cover [Abstract] | |||
| Document Type | 10-K/A | ||
| Amendment Flag | true | ||
| Amendment Description | On December 12, 2019, HP Inc. filed its Annual Report on Form 10-K for the fiscal year ended October 31, 2019 (the "Original Form 10-K"). HP Inc. is filing this Amendment No. 1 on Form 10-K/A (the "Form 10-K/A") because it will not file its definitive proxy statement within 120 days after the end of its fiscal year ended October 31, 2019. This Form 10-K/A amends and restates in its entirety Part III, Items 10 through 14 of the Original Form 10-K, to include information previously omitted from the Original Form 10-K in reliance on General Instruction G(3) to Form 10-K. The reference on the cover page of the Original Form 10-K to the incorporation by reference of portions of HP Inc.'s definitive proxy statement into Part III of the Original Form 10-K is hereby deleted. In this Form 10-K/A, unless the context indicates otherwise, the designations "HP," the "Company," "we," "us" or "our" refer to HP Inc. and its consolidated subsidiaries. In addition, as required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), certifications by HP's principal executive officer and principal financial officer are filed as exhibits to this Form 10-K/A under Item 15 of Part IV hereof. Because no financial statements have been included in this Form 10-K/A and this Form 10-K/A does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. We are not including the certifications under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Form 10-K/A. | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Document Period End Date | Oct. 31, 2019 | ||
| Document Fiscal Period Focus | FY | ||
| Document Fiscal Year Focus | 2019 | ||
| Current Fiscal Year End Date | --10-31 | ||
| Entity File Number | 1-4423 | ||
| Entity Registrant Name | HP INC. | ||
| Entity Central Index Key | 0000047217 | ||
| Entity Tax Identification Number | 94-1081436 | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Address, Address Line One | 1501 Page Mill Road | ||
| Entity Address, City or Town | Palo Alto | ||
| Entity Address, State or Province | CA | ||
| Entity Address, Postal Zip Code | 94304 | ||
| City Area Code | 650 | ||
| Local Phone Number | 857-1501 | ||
| Title of 12(b) Security | Common stock, par value $0.01 per share | ||
| Trading Symbol | HPQ | ||
| Security Exchange Name | NYSE | ||
| Entity Well-known Seasoned Issuer | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 30,007,738,276 | ||
| Entity Common Stock, Shares Outstanding | 1,433,345,730 | ||
| Documents Incorporated by Reference [Text Block] | DOCUMENTS INCORPORATED BY REFERENCE None |
